The group of visiting kids repeatedly yelled, "you ugly," while one child mockingly beat his chest, as the gorilla squatted in the sun beyond an observation window. After about 15 seconds of abuse, the gorilla suddenly presses his large hands against the glass partition and glares menacingly at his now frightened onlookers.

The children near the front can be seen scattering and stepping back. No one was hurt in the exchange at the zoo's western lowland gorilla exhibit.

Apparently satisfied with the lesson taught, the gorilla turns, but offered once final glance to the children as it walked away.